“Accumulate Objects” Decides which surfaces will have a nav-mesh baked on to them. Within our case, we wish this set to “children” since that may be wherever are cubes are. “Incorporates Levels” lets you decide what render layers you should be involved with the nav-mesh calculation. puzzle game in unity. https://codebuysell.com/game/26_Block_Puzzle_300_Levels_-_Unity_Game_Source_Code